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首页> 外文期刊>Journal of materials science >The role of adding GdCrO_3 in multiferroic CoCr_2O_4 nanoparticles
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The role of adding GdCrO_3 in multiferroic CoCr_2O_4 nanoparticles

机译：在多铁性CoCr_2O_4纳米颗粒中添加GdCrO_3的作用

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摘要

The role of adding GdCrO3 at various content in multiferroic CoCr2O4 spinel nanoparticles has been inclusively studied. The host (CoCr2O4) and secondary (GdCrO3) structures are crystallized in cubic and orthorhombic phases, respectively. The average crystallite size of host CoCr2O4 structure decreases with GdCrO3 content that it suppresses the formation of further CoCr2O4 crystals. The magnetic and magnetocaloric properties of CoCr2O4/(GdCrO3)(x) nanoparticles have been studied by performing temperature and magnetic field dependent magnetization measurements. Both saturation (similar to 16x times) and remnant (similar to 6x times) magnetizations are significantly enhanced by GdCrO3 contents compared to the CoCr2O4. The paramagnetic to ferrimagnetic phase transition temperature decreases from 96 to 92K with increasing GdCrO3 content in the structure. Around the transition temperature, the magnetic entropy changes of samples were determined via the initial M-H curves and thermo-dynamical relations. The maximum magnetic entropy change is almost 3x enhanced by adding GdCrO3 into the CoCr2O4 structure compared to the pure CoCr2O4 structure. The relatively large magnetic entropy change could be obtained by combining two CoCr2O4 and GdCrO3 multiferroic materials. The results of samples are important for usage of them in a potential magnetic refrigeration system.
机译：已经广泛研究了在多铁性CoCr2O4尖晶石纳米颗粒中添加各种含量的GdCrO3的作用。主体（CoCr2O4）和二级（GdCrO3）结构分别以立方相和正交相结晶。主体CoCr2O4结构的平均微晶尺寸随GdCrO3含量的增加而降低，从而抑制了进一步形成CoCr2O4晶体。通过执行温度和磁场相关的磁化强度测量，研究了CoCr2O4 /（GdCrO3）（x）纳米粒子的磁性和磁热性质。与CoCr2O4相比，GdCrO3含量显着提高了饱和磁化强度（约16倍）和剩余磁化强度（约6x）。随着结构中GdCrO3含量的增加，顺磁性到亚铁磁性的相变温度从96K降低到92K。在转变温度附近，通过初始M-H曲线和热力学关系确定了样品的磁熵变。与纯CoCr2O4结构相比，通过将GdCrO3添加到CoCr2O4结构中，最大磁熵变几乎提高了3倍。通过组合两种CoCr2O4和GdCrO3多铁性材料可以获得相对较大的磁熵变。样品的结果对于在潜在的磁制冷系统中使用它们很重要。

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  • 来源
    《Journal of materials science》 |2019年第7期|6459-6468|共10页
  • 作者

    Akyol Mustafa;

  • 作者单位

    Adana Sci & Technol Univ, Dept Mat Engn, TR-01250 Adana, Turkey;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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